US4287938A - Method for exchanging heat and a device for carrying out said method - Google Patents

Method for exchanging heat and a device for carrying out said method Download PDF

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Publication number
US4287938A
US4287938A US06/073,427 US7342779A US4287938A US 4287938 A US4287938 A US 4287938A US 7342779 A US7342779 A US 7342779A US 4287938 A US4287938 A US 4287938A
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United States
Prior art keywords
flow
combustion gases
medium
combustion
heat
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Expired - Lifetime
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US06/073,427
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English (en)
Inventor
Sven G. R. Lagerquist
Yngve R. Kihlberg
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/0084—Combustion air preheating
    • F24H9/0089—Combustion air preheating by double wall boiler mantle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • F23L15/02—Arrangements of regenerators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
    • F24H8/003—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation having means for moistening the combustion air with condensate from the combustion gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
    • F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
    • F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S261/00—Gas and liquid contact apparatus
    • Y10S261/09—Furnace gas scrubbers

Definitions

  • This invention relates to a method of exchanging heat between a first flow of combustion gases from combustion of fossil fuel with air and a second flow of a heat absorbing medium through a wall separating said first and second flows and according to which a volatile medium in liquid phase having a high coefficient of evaporation and a low boiling point--e.g. water--is added to said first flow in a high temperature part thereof.
  • soot or other deposits on the heat exchanger walls.
  • the size of the heat exchanger must be overdimensioned.
  • Many fossil fuels will not allow a cooling of the combustion gases to temperatures below the dew point (less than 200 degrees centigrade) because a formation of sulphuric acid will corrode the heat exchanger structure or the stack.
  • Formation of soot or deposits may amplify the tendency for corrosion as they may retain the sulphuric acid.
  • the maximum degree of efficiency will be lower than 90 percent even when the heat exchanger is adequately designed and maintained. However, the average degree of efficiency during intervals between services is generally much lower.
  • the method according to the present invention makes it possible to design a heat exchanger which is simple and has a rather small heat exchanging area and may therefore be cheap in manufacture even if made of corrosion resistant material. Soot formations are generally avoided, but the design will allow an easy cleaning, if required.
  • the method according to the invention is characterized in that the vapours of said volatile medium are caused to condense in a low temperature part of said first flow.
  • a substantial heat transfer is performed according to the heat-pipe principle--i.e. a volatile medium is vaporized at one location and condensed at another location.
  • said volatile medium in an ordinary heat pipe is performing a closed cycle within a hermetically closed system, the vaporizing and the condensing is performed at atmospheric pressure and in an open cycle according to the inventive method.
  • the condensing involves a very efficient heat transfer at low temperatures.
  • the invention also relates to a device for carrying out the claimed method and such device is shown schematically in the accompanying drawing and is described in detail below.
  • the reference numeral 1 designates a reservoir containing water.
  • a pump 2 is adapted to suck water from said reservoir 1 via a conduit 3 containing a filter 4.
  • the water is delivered to a number of spray nozzles 5 distributing the water into a flow of combustion gases delivered by an oil burner 6 of conventional design.
  • the combustion gases are initially of high temperature and are cooled off by passing tubes 7 containing liquid from a reservoir 8 having ring shaped cross section and guiding the flow of combustion gases.
  • the initial cooling of the combustion gases is effected by radiation and convection, and the combustion gases are subsequently passed through a zone 9 in which they are cooled by spraying water from the nozzles 5.
  • the water is almost instantly vaporized and the mixture of vapour and combustion gases is cooled off by passing a further bundle of tubes 10 containing liquid from a further reservoir 11 of basically the same design as the reservoir 8.
  • the mixture of vapour and combustion gases is subsequently cooled off in a zone 12 by a further water spray from the nozzles 5, and the combustion gas flow which now contains a large amount of water vapour is then cooled off by passing a third bundle of tubes 13 containing liquid from a third reservoir 14 of the same type and design as the reservoirs 8 and 11.
  • the condensed vapour will be removed as water and returned to the reservoir 1 via a conduit 15.
  • the exhaust gases are finally passed to a stack 16 in which a revolving disc 17 of porous material protrudes.
  • the disc 17 also protrudes into a duct 18 for delivering air to the combustion in the burner 6.
  • the latent heat in the combustion gases passing the stack 16 is thus recovered in a manner known per se.
  • the heat absorbed by the tubes 7,10 and 13 and by the walls of the reservoirs 8,11 and 14 is passed from the liquid in the reservoirs to a further circuit consisting of a pump 19 and tubes 20-23 and a radiator 24 connected in series.
  • the said further circuit contains a fluid which is passed in the direction from the tubes 21 in the reservoir 14 to the tubes 22 in the reservoir 11 and further to the tubes 23 in the reservoir 8.
  • a high temperature of the fluid may be obtained at the entrance of the radiator 24 while a low temperature may be maintained in the reservoir 14.
  • the temperature in the reservoir 8 may be slightly above 100 degrees centigrade, while the temperature in the reservoir 14 may be as low as 30 degrees centigrade.
  • the temperature in the reservoir 11 may be around 60 degrees centigrade.
  • the temperature of the exhaust gases in the stack 16 prior to the passing of the disc 17 may be as low as 60 degrees centigrade, and thus the greater part of their contents of vapour will condense and be returned to the reservoir 1.
  • the regenerative heat exchanger formed by the revolving disc 17 also removes water from the exhaust gases and delivers said water to the flow of combustion air.
  • the device shown comprises three reservoirs 8, 11 and 14 having decreasing temperature levels. It is of course possible to use only one reservoir having a low temperature level, but this would make it necessary to keep the further circuit including the radiator 24 at a much lower temperature level, and thus call for very large dimensions.
  • the stack of the device used may be made of materials which are not heat resistant e.g. plastic materials.
  • the water circulated in the heat exchange process will gradually increase its contents of sulphuric acid and should be neutralized by adding an alkaline substance--e.g. sodium carbonate--to the reservoir 1.
US06/073,427 1978-09-14 1979-09-07 Method for exchanging heat and a device for carrying out said method Expired - Lifetime US4287938A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7809801 1978-09-14
SE7809801A SE7809801L (sv) 1978-09-14 1978-09-14 Forangnings- kondensationsforfarande for vermeanleggningar

Publications (1)

Publication Number Publication Date
US4287938A true US4287938A (en) 1981-09-08

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Family Applications (1)

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US06/073,427 Expired - Lifetime US4287938A (en) 1978-09-14 1979-09-07 Method for exchanging heat and a device for carrying out said method

Country Status (5)

Country Link
US (1) US4287938A (sv)
JP (1) JPS5541398A (sv)
DE (1) DE2936684A1 (sv)
GB (1) GB2031572A (sv)
SE (1) SE7809801L (sv)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0217215A2 (de) * 1985-10-02 1987-04-08 EICHHORN, Karl Einrichtung zum Reinigen von Abgasen
US4681744A (en) * 1984-01-27 1987-07-21 Jacob Weitman Heat recovery device
WO1993012386A1 (en) * 1991-12-17 1993-06-24 Svenska Rotor Maskiner Ab Method for regenerative heat exchange
WO1993018833A1 (en) * 1992-03-17 1993-09-30 Hardy Sundberg Process and arrangement for vapour enrichment of air
US5676715A (en) * 1996-02-13 1997-10-14 The Babcock & Wilcox Company Key advanced linear kinetic absorber system particulate arresting device
US20100000724A1 (en) * 2002-11-27 2010-01-07 Hovalwerk Ag Method and device for cooling circulating air
US20110220333A1 (en) * 2005-01-11 2011-09-15 Ff Seeley Nominees Pty Ltd Method and materials for improving evaporative heat exchangers
US20140116657A1 (en) * 2012-10-26 2014-05-01 Michael Charles Ritchie Intercooler heat exchanger for evaporative air conditioner system
US20140145012A1 (en) * 2012-11-28 2014-05-29 Michael Charles Ritchie Intermixing assembly evaporative air conditioner system
US20140260286A1 (en) * 2013-03-14 2014-09-18 Zaher El Zahab Localized flue gas dilution in heat recovery steam generator
RU2715127C1 (ru) * 2019-07-15 2020-02-25 Михаил Евгеньевич Пузырев Роторный регенеративный теплообменник
US11959639B2 (en) * 2016-09-05 2024-04-16 Technip France Method for reducing NOX emission

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE426341C (sv) * 1980-02-14 1985-02-06 Fagersta Ab Sett att forhindra korrosion i en forbrenningsanleggnings kylare och skorsten vid kylning av rokgaser
US4583826A (en) * 1981-10-14 1986-04-22 Hoffmann-La Roche Inc. Phenylethanes
DK439582A (da) * 1982-01-07 1983-07-08 Scanergi Miljoe Energisyst Fyringsanlaeg med kondenserende kedel
WO1984000803A1 (en) * 1982-08-09 1984-03-01 Dimitrijevic Cedomir Method for a rational and ecological exploitation of primary energy
DE3689486T2 (de) * 1985-08-01 1994-07-21 Raytheon Co Brennwertkessel.
US4726353A (en) * 1985-08-01 1988-02-23 Raytheon Company High condensing recuperative furnace
US4603681A (en) * 1985-10-07 1986-08-05 Raytheon Company Condensing furnace with corrosion suppression
FR2589987B1 (fr) * 1985-11-13 1988-09-02 Charbonnages De France Perfectionnements aux chaudieres a tube foyer horizontal brulant du charbon pulverise
SE458800B (sv) * 1987-08-28 1989-05-08 Lars Tiberg Foerfarande foer oeverfoering av vatten fraan roekgaser till foerbraenningsluft med regenerativ vaermevaexling
GB8812251D0 (en) * 1988-05-24 1988-06-29 Stelrad Group Ltd Bottles
DK169634B1 (da) * 1990-06-18 1994-12-27 Froehlich Air Aps Fremgangsmåde og apparat til optimering af virkningsgraden og minimering af nox-dannelsen i forbrændingsanlæg
FR2670873B1 (fr) * 1990-12-24 1993-06-11 Seccacier Chaudiere a condensation a injection d'eau controlee.
FR2726893B1 (fr) * 1994-11-16 1997-01-31 Gaz De France Chaudiere destinee au chauffage d'un fluide de travail
FI104996B (sv) * 1996-05-09 2000-05-15 Raimo Vaeaenaenen Förfarande och anordning för att generera het gas
GB2390668B (en) * 2001-10-13 2005-05-25 Alastair Robertson Improved heating system
GB0124669D0 (en) * 2001-10-13 2001-12-05 Robertson Alastair Improved secondary heat exchanger for water boiler
GB2415244B (en) * 2004-06-19 2007-09-12 Alastair Robertson Improvements in and relating to heating systems and water heating apparatus for such systems
WO2013021008A2 (de) * 2011-08-09 2013-02-14 Robert Bosch Gmbh Heizgerät für eine erwärmung eines nutzfluides und verfahren zu seinem betrieben
GB201501265D0 (en) * 2015-01-26 2015-03-11 Isentropic Ltd Heat exchanger
IT201900013104A1 (it) * 2019-07-26 2021-01-26 Immergas Spa Caldaia a condensazione
CN112944381B (zh) * 2021-04-23 2022-01-07 王耀 一种燃烧器用内部换热系统

Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2321933A (en) * 1942-08-19 1943-06-15 Niagara Blower Co Apparatus for maintaining the desired temperature of liquids
US2570247A (en) * 1945-01-05 1951-10-09 Niagara Blower Co Condenser
US3169575A (en) * 1961-10-27 1965-02-16 Baltimore Aircoil Co Inc Evaporative heat exchanger
US3522000A (en) * 1967-09-06 1970-07-28 Chillum Sheet Metal Inc Method and apparatus for cooling and purifying gaseous products of combustion
DE2131796A1 (de) * 1971-06-26 1972-12-28 Hans Dr Hesky Verfahren und Vorrichtung zur Reinigung von hohe Schornsteine passierenden Abgasen
US3748080A (en) * 1971-12-27 1973-07-24 Peabody Engineering Corp Combustion control apparatus using a liquid spray
US3797204A (en) * 1971-11-11 1974-03-19 D Cavatassi Smoke washer apparatus
US3799249A (en) * 1969-11-26 1974-03-26 Air Reduction Inc Hot gas heat exchanger
US3833205A (en) * 1972-02-02 1974-09-03 Midland Ross Corp Apparatus for eliminating water vapor from processed air
US3839849A (en) * 1971-08-24 1974-10-08 G Maniya Wet type desulfurization system for flue gas
US3854909A (en) * 1973-02-05 1974-12-17 Hb2 Inc Heat exchanger for power plants
US3860384A (en) * 1972-05-25 1975-01-14 Intelcon Rad Tech Method to control NOX formation in fossil-fueled boiler furnaces
US3880597A (en) * 1971-10-12 1975-04-29 Steag Ag Device for separating so{hd 2 {b and dust from flue gases
US3888642A (en) * 1972-11-28 1975-06-10 James Toyama Steam dust scrubber attachment for exhaust stack
US3927153A (en) * 1973-08-14 1975-12-16 Bethlehem Steel Corp Process for direct cooling of corrosive industrial cases
DE2504839A1 (de) * 1975-02-06 1976-08-19 Heinz Hoelter Verfahren zur reinigung der erzeugten gase bei der kohledruckvergasung
DE2553415A1 (de) * 1975-02-14 1976-08-26 American Air Filter Co Verfahren zur gasreinigung
US4017277A (en) * 1975-02-06 1977-04-12 Dyke Sr Bingham H Van Direct contact water heating system and process
US4065527A (en) * 1976-02-19 1977-12-27 Graber David A Method and apparatus for interaction of gas and liquid
US4121541A (en) * 1976-03-27 1978-10-24 Saarbergwerke Aktiengesellschaft Process for purifying flue gases

Patent Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2321933A (en) * 1942-08-19 1943-06-15 Niagara Blower Co Apparatus for maintaining the desired temperature of liquids
US2570247A (en) * 1945-01-05 1951-10-09 Niagara Blower Co Condenser
US3169575A (en) * 1961-10-27 1965-02-16 Baltimore Aircoil Co Inc Evaporative heat exchanger
US3522000A (en) * 1967-09-06 1970-07-28 Chillum Sheet Metal Inc Method and apparatus for cooling and purifying gaseous products of combustion
US3799249A (en) * 1969-11-26 1974-03-26 Air Reduction Inc Hot gas heat exchanger
DE2131796A1 (de) * 1971-06-26 1972-12-28 Hans Dr Hesky Verfahren und Vorrichtung zur Reinigung von hohe Schornsteine passierenden Abgasen
US3839849A (en) * 1971-08-24 1974-10-08 G Maniya Wet type desulfurization system for flue gas
US3880597A (en) * 1971-10-12 1975-04-29 Steag Ag Device for separating so{hd 2 {b and dust from flue gases
US3797204A (en) * 1971-11-11 1974-03-19 D Cavatassi Smoke washer apparatus
US3748080A (en) * 1971-12-27 1973-07-24 Peabody Engineering Corp Combustion control apparatus using a liquid spray
US3833205A (en) * 1972-02-02 1974-09-03 Midland Ross Corp Apparatus for eliminating water vapor from processed air
US3860384A (en) * 1972-05-25 1975-01-14 Intelcon Rad Tech Method to control NOX formation in fossil-fueled boiler furnaces
US3888642A (en) * 1972-11-28 1975-06-10 James Toyama Steam dust scrubber attachment for exhaust stack
US3854909A (en) * 1973-02-05 1974-12-17 Hb2 Inc Heat exchanger for power plants
US3927153A (en) * 1973-08-14 1975-12-16 Bethlehem Steel Corp Process for direct cooling of corrosive industrial cases
DE2504839A1 (de) * 1975-02-06 1976-08-19 Heinz Hoelter Verfahren zur reinigung der erzeugten gase bei der kohledruckvergasung
US4017277A (en) * 1975-02-06 1977-04-12 Dyke Sr Bingham H Van Direct contact water heating system and process
DE2553415A1 (de) * 1975-02-14 1976-08-26 American Air Filter Co Verfahren zur gasreinigung
US4065527A (en) * 1976-02-19 1977-12-27 Graber David A Method and apparatus for interaction of gas and liquid
US4121541A (en) * 1976-03-27 1978-10-24 Saarbergwerke Aktiengesellschaft Process for purifying flue gases

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4681744A (en) * 1984-01-27 1987-07-21 Jacob Weitman Heat recovery device
EP0217215A2 (de) * 1985-10-02 1987-04-08 EICHHORN, Karl Einrichtung zum Reinigen von Abgasen
EP0217215A3 (de) * 1985-10-02 1988-02-03 EICHHORN, Karl Einrichtung zum Reinigen von Abgasen
WO1993012386A1 (en) * 1991-12-17 1993-06-24 Svenska Rotor Maskiner Ab Method for regenerative heat exchange
US5482108A (en) * 1991-12-17 1996-01-09 Svenska Rotor Maskiner Ab Method for regenerative heat exchanger
WO1993018833A1 (en) * 1992-03-17 1993-09-30 Hardy Sundberg Process and arrangement for vapour enrichment of air
US5676715A (en) * 1996-02-13 1997-10-14 The Babcock & Wilcox Company Key advanced linear kinetic absorber system particulate arresting device
US5707426A (en) * 1996-02-13 1998-01-13 The Babcock & Wilcox Company Key advanced linear kinetic absorber method using a particulate arresting device
US20100000724A1 (en) * 2002-11-27 2010-01-07 Hovalwerk Ag Method and device for cooling circulating air
US8038129B2 (en) * 2002-11-27 2011-10-18 Hovalwerk Ag Method and device for cooling circulating air
US20110220333A1 (en) * 2005-01-11 2011-09-15 Ff Seeley Nominees Pty Ltd Method and materials for improving evaporative heat exchangers
US8636269B2 (en) * 2005-01-11 2014-01-28 Ff Seeley Nominees Pty Ltd Method and materials for improving evaporative heat exchangers
US20140116657A1 (en) * 2012-10-26 2014-05-01 Michael Charles Ritchie Intercooler heat exchanger for evaporative air conditioner system
US20140145012A1 (en) * 2012-11-28 2014-05-29 Michael Charles Ritchie Intermixing assembly evaporative air conditioner system
US9138761B2 (en) * 2012-11-28 2015-09-22 CoolFactor, LLC Intermixing assembly evaporative air conditioner system
US20140260286A1 (en) * 2013-03-14 2014-09-18 Zaher El Zahab Localized flue gas dilution in heat recovery steam generator
US9587828B2 (en) * 2013-03-14 2017-03-07 Siemens Aktiengesellschaft Localized flue gas dilution in heat recovery steam generator
US11959639B2 (en) * 2016-09-05 2024-04-16 Technip France Method for reducing NOX emission
RU2715127C1 (ru) * 2019-07-15 2020-02-25 Михаил Евгеньевич Пузырев Роторный регенеративный теплообменник

Also Published As

Publication number Publication date
JPS5541398A (en) 1980-03-24
SE7809801L (sv) 1980-03-15
DE2936684A1 (de) 1980-04-03
GB2031572A (en) 1980-04-23

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